Answer:
“The commuter is the queerest bird of all. The suburb he inhabits has no essential vitality of its own and is a mere roost where he comes at day’s end to go to sleep.”
Figurative language is frequently used to for the sake of humor. As you may know, when figurative language is used (as opposed to literal language) we are to take what is said to mean as something other than what it is generally understood to mean, and of the four possible responses, only the last response contains figurative language. For instance, “queerest bird” is used in reference to a commuter, and “roost”—a word typically reserved when referencing birds’ sleep—is used in reference to human sleep. This comparison paints a funny picture and certainly provides an element of humor for the article.